[hdhfjkrkrme]

You can use this argument against anything not done yet: "we've been trying to build fusion reactors for 50 years now, we should give up now"

[Eisenstein]

Except that isn't the argument I am making.

[hdhfjkrkrme]

We have small quantum computers, we don't have big ones.

We have fusion power on small scale, we don't have it on commercial scale.

Seems to be the same argument.

[count]

We have small, usable quantum computers and have grown them for years.

We have never had fusion power on a small scale (we have had fusion ignition/reaction, but never [afaik] generated usable power), let alone showed continuous growth in scale of that power over the years.

They're not the same. Fusion is a 'science' problem, quantum is (mostly) an 'engineering' problem.

[Eisenstein]

Re-read my comment and then point out the spot where I advocated ceasing research and development of anything.